Cutting- cushion por polding cylinders



H. A. w. wooD Dec, 2, 1930, CUTTING CUSHION FOR FOLDING cYLINnERs Re.17,892

I Original Fied sept. 27. 192e Reissued Dec. 2, 1930 UNITED STATES HENRYA. VISE WOOD, 0F NEW YORK. N.

Y' Assn-,moa ro woon NnwsrAPnR MA- CHINERY CORPORATION, OF NEW YORK, N.Y., A CORPORATION 0F VIRGINIA CUTTING CUSHION' FOR FOLDING CYLINDEBSOriginal No. 1,766,807, dated` .Tune 24, 1930, Serial vNo. 308,636,filed September 27, 1928.- Application for reissue filed August 27,1930. SerialNc. 478,261, Y n f f l This invention relates to the cushionusually formed of rubber mounted on the folding cylinder of a foldingcouple for receiving the cutting blade on the cutting cylinder.

The principal objects of t-he invention are to provide for backing upthe cutting cushion or rubber so as to make cutting easier; to provide abacking device which can be turned easily so as to present a largenumber of sur faces to the knife as grooves are cut in it thereby; andto provide automatic means for continuously closing up the cut producedin the rubber.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying ,drawinga in which Fig. .1 isa sectional view of a folding couple showing the present invention andits operation;

Fig. 2 is a side view of the folding cylinder, and

Fig. is a view similar to Fig. 1 showing a modification,

Ordinarily the cushion or cutting rubber with which the' foldingcylinder of a folding couple is provided to receive the thrust of theblade of the cutting cylinder has such dimensions as' to permit theknife to pass Jl ough a series of webs and into the rubber reik'xeatedlywithout leaving an unduly large groove therein, but with the best thatcan be done thegroove grows larger and larger and finally becomestoolarge to offer the proper resistance to the paper While being cut and ithas to be removed. While this` groove is being worn larger and largerthere is a time when an irregular cut is obtained before the rubber isactually replaced. This irregular cut causes considerable trouble in thefolder. YWith this invention these disadvantages are avoided.

Referring to Figs. 1 and 2, the folding cylinder 10 is shown as havingthe usual impaling pins l1. The usual cutting cylinder 12 is shown, andthe usual cutting blade 13. The cutting cushion 14 of soft rubber islocated in a holder 15 having projections 1G foibalding the rubber.Behind the rubber is located a solid backer 17, shown in this case asarod or cylinder of wood or other ymaterial of a semi-hard naturewhichwill not dull thecutting knifeas most kinds of metal would. This fillsthe space between the holderl and? backs up the cutting rubber withwhich itis in contact at'two points as indicated.

.The introductionfof this semi-,hard backer impartsconsiderable-stiffness to the rubber 1li in the direction of the cut.This. condition is most desirable. It holds therrubber up to itsproprpositionin the cylinder and prevents its .displacement inwardly. Byhaving the rod 17 Vround it canbe turned and will present a large numberyof ysurfaces to the knife as grooves become cut in the rod Thus itlasts a long time. l.

@f cou-rse the rubber becomes cut anyway and the groove would have atendency to grow wider, but means are providedn for continuously closingin the groove'left by the frequent insertion of the knife.` Thisconsists ofa bar 20 pivoted on a stud 2l and located circumferentiallybeyond the cutting rubber.

lt has ai projecting surface 22 which takes the place of one side of theholder 15.

By vmeans of a plunger 23 and a spring 24 this ban is constantly rforcedinwardly and thus the rubber is'moved inwardly slightly to compensatefor-the groove cutv in it. In this way theadvantages of thesemi-hardrubber, which is A'sometimes-einployed to secure the desired(stiffness, are retained, and yet the disadvantage ofthis h ard rubber,which lies in its stiifness'and brittleness and resultsin its earlydestruction, is avoided. A greater resistanceis sec'uredtoI the cut thanhas been obtained heretofore with soft rubber, and at the samegtime thelife of the rubber'is lengthened since the groove cut therein is continually andy continuously being closed up.

Inthe form shown in Fig. 3, the backing piece of woodQ/Z ismade squareand thus then advantages labove' mentioned .areall secured, exceptv thatof being ableto present 9 different surfaces of the wood to theknife.This backing piece has to be replaced much more frequently than acylindricalone does.

Although I have illustrated'and described only two forms of theinvention I am aware of the fact that other modifications cank be madetherein by any person skilled in the art Without departing from thescope of the invention as expressed in the claims. Therefore I do notWish to be limited in this re-v spect but what I do claim is 1. Thecombination With a cutting blade, of a cushion for receiving the blade,a carrier e or support for the cushion, and solid means m behind thecushion for backing it up, capable of being turned'to present'dife-rentsurfaces lto the blade. Y

f` 2. vThe combination With a cutting blade,vof A `a soft rubber cushionforreceiving the edge 15 of the blade, a carrier or ksupport for thecushion, and a semiihard backer behind the cushion, capable of beinturned to present different surfaces to the glade. I

3.'The Acombination -With a cuttingfblade, 2() of a' cushion to receivethe blade, a' carrier or support for said cushion, anda cylindricalbacking rod located in -the carrier behind the'` cushion for backing itup and imparting stiffness to it.-v 1 4;. The combination with a lcutting blade,

n of a soft'rubb'er cushion to receive the blade,

a carrierorsupport for said cushion, and a backing rod located in thecarrier behind the rubber, capable of being turned to present differentsurfaces to the blade.

5. The combination with a cutting blade, of a cushion, acarrier orVsupport for'the cushion, a solid backing ieee behind' the cushion forimparting sti ness thereto, and

' means for pressing one side of the cushion toward the other and thusclosing the cut formed in the cushion.

6. The combination with ay cuttingl blade,

ofa cushion to receive said blade, a carrier nl or support for thecushion, and yielding means for pressing one side of the cushionlaterally toward theother and thus always tending to closethe cut formedinthe cushion.

. The combination With a cutting blade,

of a cushion for receiving the edge of the blade, a carrier or supportfor the cushion, the cushion being. held in iXed position on one'.rside,fa movable member engaging the opposite` surface of the cushion,and `means 5b for forcing "said member toward the cushion l to tend toclose up the cut formed therein.

8. The combination with a cutting blade, of a rubber for receivingtheedge 'of the blade, `a carrier or support for the rubber, the

rubber being held in iixed position on one side, a pivoted rodon theopposite side engaging the oppositesurface of the cushion, aspringpressed plunger engaging the back of said rod, and means forvforcingthe rod toward the rubber totend to `close up `the cut formed init.

In testimony. whereof I have hereunto affixed myy signature. i

' 1 HENRY A. vWISE WOOD.`

